A transverse steel ball clamping structure

Abstract

This utility model relates to the field of hydraulic cylinder technology, and more particularly to a transverse steel ball fastening structure. The technical solution includes: a cylinder body, a piston rod disposed within the cylinder body, a piston disposed between the outer ring of the piston rod and the inner wall of the cylinder body, a threaded groove on one side of the piston, and two sets of steel ball grooves at a transverse position perpendicular to the axis of the threaded groove. Multiple sets of steel balls are embedded in each set of steel ball grooves. An annular positioning groove is formed on the piston rod corresponding to the position of the steel ball groove. A fastening bolt is screwed into the threaded groove, and an adjustment surface is formed on the fastening bolt. This utility model, by arranging the steel balls and the fastening bolt perpendicular to the direction of force, ensures that the steel balls and the fastening bolt mutually constrain each other, significantly reducing the risk of loosening due to unidirectional forces and improving fastening reliability. Simultaneously, the embedding of steel balls in the steel ball grooves and the annular positioning groove effectively restricts the circumferential and radial displacement of the piston and piston rod, enhancing the working stability of the hydraulic cylinder.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to a transverse steel ball clamping structure. Background Technology

[0002] In the piston fastening structure of hydraulic cylinders, the traditional steel ball fastening design has significant drawbacks. In conventional designs, the steel ball extrusion direction is the same as the set screw extrusion direction. When the cylinder is subjected to vibration and pressure impact, the steel ball is easily affected by the same-direction force, causing the connection between the piston and piston rod to loosen, reducing the cylinder's stability and service life, and failing to meet the requirements for fastening reliability under complex working conditions. Although steel ball fastening structures are used for piston fastening, they are difficult to adapt to harsh scenarios such as high pressure and high-frequency vibration in terms of force interaction and anti-loosening effect. Therefore, we propose a transverse steel ball fastening structure. Utility Model Content

[0003] The purpose of this invention is to address the problems existing in the background technology by proposing a transverse steel ball clamping structure.

[0004] The technical solution of this utility model is as follows: A transverse steel ball fastening structure includes a cylinder body, a piston rod disposed inside the cylinder body, a piston disposed between the outer ring of the piston rod and the inner wall of the cylinder body, a threaded groove on one side of the piston, and two sets of steel ball grooves disposed at a transverse position perpendicular to the axis of the threaded groove, each set of steel ball grooves containing multiple sets of steel balls, an annular positioning groove disposed on the piston rod corresponding to the position of the steel ball groove, a fastening bolt screwed into the threaded groove, an adjusting surface disposed on the fastening bolt, the force direction of the steel ball being subjected to is perpendicular to the extrusion direction of the fastening bolt, and the reaction force generated by the fastening bolt being squeezed by the steel ball being opposite to the extrusion direction of the steel ball.

[0005] Preferably, the piston rod and the piston are pre-tightened together by threads, the outer ring of the piston is tightly fitted to the inner wall of the cylinder, and the outer ring of the piston is provided with two sets of sealing gaskets.

[0006] Preferably, both sets of ball grooves are formed along the piston axis.

[0007] Preferably, the portion of the steel ball protruding from the steel ball groove is installed corresponding to the annular positioning groove.

[0008] Preferably, the width of the ball groove is adapted to the diameter of the ball, the width of the annular positioning groove is greater than the diameter of the ball, the depth of the ball groove is less than the diameter of the ball, and the ball, the ball groove, and the annular positioning groove are interference fit.

[0009] Preferably, the fastening bolt is threadedly connected to the threaded groove, and the thread specification of the fastening bolt matches the threaded groove.

[0010] Preferably, one end of the adjustment surface is planar, and the other end is sloping, with the adjustment surface abutting against the steel ball.

[0011] Compared with the prior art, the present invention has the following beneficial technical effects:

[0012] This invention uses the perpendicular orientation of the steel balls and fastening bolts to constrain each other, significantly reducing the risk of loosening caused by unidirectional forces and improving fastening reliability. Simultaneously, the embedding of steel balls into the steel ball groove and the annular positioning groove effectively limits the circumferential and radial displacement of the piston and piston rod, enhancing the stability of the hydraulic cylinder. The overall structure is simple and suitable for fastening pistons in various hydraulic cylinders, especially under high-pressure and high-frequency vibration conditions, maintaining stable connection performance and expanding the application scenarios of hydraulic cylinders. Attached Figure Description

[0013] Figure 1 A schematic diagram of the conventional design structure of an existing conventional hydraulic cylinder piston;

[0014] Figure 2 This is a partial sectional view of the present invention;

[0015] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle.

[0016] Reference numerals: 1. Cylinder body; 2. Piston rod; 3. Piston; 4. Steel ball; 5. Fastening bolt; 6. Threaded groove; 7. Adjusting surface; 8. Sealing gasket. Detailed Implementation

[0017] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0018] Example

[0019] like Figure 1-3 As shown, this utility model proposes a transverse steel ball tightening structure, including a cylinder body 1, a piston rod 2 disposed inside the cylinder body 1, and a piston 3 disposed between the outer ring of the piston rod 2 and the inner wall of the cylinder body 1. The piston rod 2 and the piston 3 are pre-tightly installed by threads, and the outer ring of the piston 3 is tightly fitted to the inner wall of the cylinder body 1. Two sets of sealing gaskets 8 are provided on the outer ring of the piston 3, and the mounting ends of the sealing gaskets 8 are fitted to the inner wall of the mounting groove on the outer ring of the piston 3. The setting of the sealing gaskets 8 can provide better sealing performance between the outer ring of the piston 3 and the inner wall of the cylinder body 1. Figure 2-3As shown, a threaded groove 6 is provided on one side of the piston 3, and two sets of ball grooves are provided at a transverse position perpendicular to the axis of the threaded groove 6. Both sets of ball grooves are provided along the axial direction of the piston 3. Multiple sets of ball 4 are embedded in each set of ball grooves. An annular positioning groove is provided on the piston rod 2 corresponding to the position of the ball groove. The part of the ball 4 protruding from the ball groove is installed in the annular positioning groove. The width of the ball groove is adapted to the diameter of the ball 4. The width of the annular positioning groove is greater than the diameter of the ball 4. The depth of the ball groove is less than the diameter of the ball 4. The ball 4 is interference-fitted with the ball groove and the annular positioning groove. The arrangement of the two sets of ball grooves and the annular positioning groove with multiple sets of ball 4 can effectively limit the circumferential and radial displacement of the piston 3 and the piston rod 2, and enhance the stability of the cylinder operation.

[0020] A fastening bolt 5 is screwed into the threaded groove 6, and the fastening bolt 5 is threadedly connected to the threaded groove 6. The thread specification of the fastening bolt 5 matches that of the threaded groove 6. An adjustment surface 7 is provided on the fastening bolt 5. One end of the adjustment surface 7 is flat, and the other end is sloped. The adjustment surface 7 abuts against the steel ball 4. The setting of the adjustment surface 7 allows the tightness between the steel ball 4 and the piston 3 to be adjusted by rotating the fastening bolt 5. This allows the tightness between the piston 3 and the piston rod 2 to be adjusted according to different operational requirements. The direction of the force on the steel ball 4 is perpendicular to the extrusion direction of the fastening bolt 5. The direction of the reaction force generated by the compression of the steel ball 4 on the fastening bolt 5 is opposite to the extrusion direction of the steel ball 4. The mutual arrangement of the steel ball 4 and the fastening bolt 5 through the cooperation of the adjustment surface 7 ensures that the direction of the force on the steel ball 4 and the fastening bolt 5 is perpendicular, thereby constraining the steel ball 4 and the fastening bolt 5, greatly reducing the risk of loosening caused by co-directional force, and improving the reliability of fastening.

[0021] In this embodiment, the piston 3 is tightened by threading the top of the piston rod 2 so that the annular positioning groove on the piston rod 2 is aligned with the ball groove of the piston 3. Then, the ball 4 is placed into the ball groove of the piston rod. Finally, the fastening bolt 5 is screwed into the threaded groove 6 until the adjusting surface 7 on the fastening bolt 5 is in close contact with the ball 4 and pressure is applied, so that the protruding part of the ball 4 is embedded in the annular positioning groove, forming a stable lateral tightening constraint.

[0022] The above-described specific embodiments are merely preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above-described specific embodiments.

Claims

1. A transverse steel ball retaining structure, comprising a cylinder (1), characterized in that: A piston rod (2) is provided inside the cylinder (1). A piston (3) is provided between the outer ring of the piston rod (2) and the inner wall of the cylinder (1). A threaded groove (6) is provided on one side of the piston (3). Two sets of steel ball grooves are provided at the transverse position perpendicular to the axis of the threaded groove (6). Multiple sets of steel balls (4) are embedded in each set of steel ball grooves. An annular positioning groove is provided on the piston rod (2) corresponding to the position of the steel ball groove. A fastening bolt (5) is screwed into the threaded groove (6). An adjustment surface (7) is provided on the fastening bolt (5). The force direction of the steel ball (4) is perpendicular to the extrusion direction of the fastening bolt (5). The reaction force generated by the fastening bolt (5) under the pressure of the steel ball (4) is opposite to the extrusion direction of the steel ball (4).

2. The transverse steel ball fastening structure according to claim 1, characterized in that, The piston rod (2) and the piston (3) are pre-tightened together by threads. The outer ring of the piston (3) is tightly fitted to the inner wall of the cylinder (1). The outer ring of the piston (3) is provided with two sets of sealing gaskets (8).

3. The transverse steel ball fastening structure according to claim 1, characterized in that, Both sets of ball grooves are opened along the piston (3) axial direction.

4. The transverse steel ball fastening structure according to claim 1, characterized in that, The protruding part of the steel ball (4) is installed in accordance with the annular positioning groove.

5. The transverse steel ball fastening structure according to claim 1, characterized in that, The width of the ball groove is adapted to the diameter of the ball (4), the width of the annular positioning groove is greater than the diameter of the ball (4), the depth of the ball groove is less than the diameter of the ball (4), and the ball (4) is in an interference fit with the ball groove and the annular positioning groove.

6. The transverse steel ball fastening structure according to claim 1, characterized in that, The fastening bolt (5) is threadedly connected to the threaded groove (6), and the thread specification of the fastening bolt (5) matches that of the threaded groove (6).

7. The transverse steel ball fastening structure according to claim 1, characterized in that, One end of the adjustment surface (7) is planar, and the other end of the adjustment surface (7) is sloping. The adjustment surface (7) abuts against the steel ball (4).

Images